Saw handle



v. Oct. 22, 1935.

J. E. DAVEY SAW HANDLE Filed May 27, 1935 ATTORNEY.

Patented a. 22,

UNITED TATES PATENT. OFFICE This invention relates to blade holdingdevices, and has among its objects the provision of a simple,inexpensive device; which shall be convenient tooperate, and which shallbe com- I pact, durable, and reliable in use.

Another object of the invention is to provide a device as setforthwherein the only movable part shall be the blade; also to provide simplemeans for holding the blade in different positions; and further toprovide a simple blade flexing and hence stifiening and frictlonallysecuring arrangement. P

Other objects and advantages oi! the invention will become apparent asthe specification proceeds.

With the aforesaid objects in view, the invention consists in the novelcombinations and arrangements of parts hereinafter described in theirpreferred embodiments, pointed out in the'subjoined claims, andillustrated in the annexeddrawing, wherein like parts are designated bythe same reference characters throughout the several views.

In the drawing:

Figure Us a view in side elevation of a device embodying the inventionwith parts in dot-dash lines to indicate interchangeability of position.

Fig. 2 is a fragmentary side view of a'blade element of the invention.

Fig. 3 is a diagrammatic view of the blade attaching means in initialposition 01' angularly moving the blade to secure the same.

Fig. 4 is a top plan view oi the device shown in Fig. 1, with the bladein difierent positions as indicated in dot-dash lines.

Fig. 5 is a horizontal sectional view taken on line 5-5 of Fig. 1.

Figs. 6, 7, and 8 are enlarged vertical sectional views taken on therespective lines 6-6, 'I- and Til-8 of Fig. 1, and showing the blade indifferent positions in dot-dash lines.

Fig. 9 is a fragmentary enlarged sectional view indicating particularlythe cam hof The advantages of the invention as lined are best realizedwhen all features and instrumentalitiesare combined in one and the samestructure, but, useful devices may be produced embodying less .than thewhole.

It will be obvious to those skilled in the art to which the inventionappertains, that the same may be incorporated in several differentconstructions. The accompanyi w theremresubmitted merely as showing theDrfened 3 plification oi the invention.

Referring in detail to the drawi g. (1950593 8. device embodyim thlnvemion- The a may include a saw'blade II and a holding means I 2'thereior. The blade may have. a longitudinal closed ended slot l8 spacedfrom an and N thereof, and a transverse slot I5 opening into the sawedge it of the blade. The slot l5 may have 5 its inner portion l allnedwith the slot l8 along the median line of the blade, and the slot l5 mayhave as the center of its radius the central point of the slot l3. Theentrance to the slot l5 may include a cam formation at i8, and the slotmay 10 lie intermediate the slot l3 and the blade end M.

The holding means l2 may comprise a shank IQ and a handle at an anglethereto and lying in a plane therewith. A projecting trigger likeportion 2|;may extendirom the shank in spaced 1 relation to the handle20 and in the regionof the angle.- The handle may'include a rearprojection 22 for bracing the operator's hand. When the latter grips thehandle 20, the index finger may encircle the portion 2| and the middlefinger may lie in the space 23 so as to bear against the portion Zl-inthe direction of sawing.

The shank l 9 may be of generally rectangular form and may have meansfor securing the blade II at either side as at A, B, or at the topthereof 55 as at C, to facilitate sawing in angles or corners withmaximum convenience and without injuring the operators hand. For thesame reasons, the blade may be attachable in inverted er reversedpositions,-- for example, with the saw edge 58 $9 uppermost or'iaclngtoward either side if the blade is at the top. Each securing means maybe identical, as the same blade may be held in the different andinverted positions. A description of a holding structure at one side ofthe shank is will therefore apply to the devices for all positions A, B,and C.

The shank is may include a T-headed stud 2% preferably rigid withtheshank and having a stud portion 25 and ahead 28. The part 25 ex- Mtends at right angles from a wall or the shank, and the head 26 may beelongated transversely relatively to the shank 19. The underface of thehead 26 may be convexed from end to end thereof in the manner of a camas shown at 21, although it. may be plane adjacent to thestud portion25. The head 26 is adapted to pass through the slot is and engage overthe blade.

. Longitudinally spaced from the member 28, is a holding element or pin21 extending at right 0 angles irom the face of the shank I9.

Spaced longitudinally trom the pin 21 is a hook like tongue or finger:portion 28 which is rigid with the shank l9 and is nearest the handleii. The members. 21 and 2d are disposed along a median line of the faceof the shank at which they are located.

Intermediate oi" the successive pairs of the members 24, 21 and 28 arecut cuts or openings 29, 30 extending from side to side of the shank l9.Thus cross elements 3!, 32 are formed to which the members 24, 21aresecured. The tongue 28 may extend over a part of the opening 30 whichforms an undercut therewith and simplifies the casting of the tongue.

The spacing between the members 24 and 21 is greater than that betweenthe slots II and I1, so that upon angularly moving the blade I I aboutthe stud 25, the slot Ii first follows'a path 33 as shown in Fig. 3, andwhen the cam part l8 engages the pin 21, the blade II is shiftedlongitudinally rearward so that the stud 2i abuts the forward end of theslot It as shown in Fig. 1. The path 33 may shift at 34 into the path35, which completes the angular movement for attaching the blade.

The end H! of the blade is round and may have similar cam engagementwith the tongue 28 at the inner edge thereof. As the blade is angularlymoved, its end is passed under the tongue 28, which holds the samesnugly against the shank l9.

In course of the angular movement of the blade, the longitudinal edgeportions of the slot it are engaged with increasing force by the camportions 21 which thus ride over the blade and press the same stronglyagainst the shank IS.

The members 24,- 21, 28 may lie along a longitudinal seat 36 concavedtransversely of the shank and being preferably somewhat wider than theblade, and the said members lie along a median line of the seat. Hencethe blade ll may be transversely flexed by the cam head 2. into the seatand caused to strongly frictionally grip the seat 36 at the edges of theblade. If blades of different widths are to be secured, a blade of lesswidth may have a narrower slot I! so as to engage further under the cams21, to be correspondingly forced into the seat, and if the blade bewider, the slot l3 may be made wider for less cam engagement andto beless depressed into the seat and for requisite clearance. Hence the samedevice may be used to hold blades of different sizes.

The frictional engagement in'the seat a prevents the blade fromaccidentally angularly mov-- ing into disengagement.

The tongues 28 may be so spaced outward of the seat as to permit theblade to engage thereunder with no, or a desired degree of, bladeflexure. The members 24 and 2B cooperate to prevent lateral springingand breakage of the'blade at the handle and to avoid disengagement ofthe blade from the pin 21.

When secured, the blade is perfectly r gid. and yet it can be attachedand detached without moving other parts, and may be engaged in any ofthe positions A, B, and C, and with the saw edge I6 facing in eitherdirection for each position.

It will be appreciated that various changes and modifications may bemade in the device as shown in the drawing, and that the same issubmitted in an illustrative and not ln a limiting sense, the scope ofthe invention being defined in the following claims.

I claim:

1. A device including a blade having a longitudinal closed ended slot, atransverse slot open at one end, 'a holding means having a stud, saidstud having a head adapted to pass through said slot to engage the bladeon angular movement thereof and being elongated transversely of theblade and the holding means, and the latter having a pin engageable inthe open ended slot upon angular movement'of the blade, said open endedslot having a cam portion to engage the I pin and cause the blade tomove longitudinally so that the stud abuts an end of the closed endedslot to rigidly hold the blade in the longitudinal direction.

- 2'.'A device including a blade having a longi- 10 tudinal closed endedslot. a transverse slot open at one end, a holding means having a stud,said stud havinga head adapted to pass through said slot to engage theblade on angular movement thereof and being elongated transversely ofthe 18 blade and the holding means, and the latter havtudinal closedended slot, a holding means having a transversely concaved elongatedseat. said holding means having means to secure the blade inlongitudinally extending relation along said a seat, the securing meansincluding a headed stud. the head of said stud being .elongatedtransversely of the seat and adapted to pass through the slot to engageover the blade on angular-1y moving the latter into longitudinalrelation to the seat, and said head having cam faces on its under sideto press the blade against the seat for transversely flexing the bladein the seat to cause the blade to tightly frictionally engage theseatat" the edges of the blade. a

4. A device including a blade having a longi- 4o tudinal closed endedslot, a holding means having a longitudinal concave seat, the bladebeing of less width than the seat and being adapted to' be transverselyflexed into the seat, the holding means having a rigid T-shapedstudprojecting is from the seat with the head of the stud extendingtransversely of the seat and adapted to engage the blade through theslot thereof on angu- -lar movement of the blade, said head having itsunder side convexed from end to end to consti- 50 tute a cam forpressing the blade into flexed seating relation in the seat, and meanslongitudinally spaced from the stud and connected to the holding meansfor securing the blade in the seat, the said means and the stud beinglocated along a median line of the seat, the said means includn a hookportion under which the blade is engageable.

5. A device including a blade having a longitudinal closed ended slot, aholding means having a longitudinal concave seat, the blade being ofless width than the seat and being adapted to be transversely flexedinto the seat, the holding means having a rigid 'r-shaped studprojecting 'from the seat with the head of the stud extendingtransversely of the seat and adapted to engage the blade through theslot thereof on ang ular movement of the blade, said head having itsunder sideconvexed from end to end to constitute a cam for pressing theblade into flexed seating relation in the-seat, and means longitudinallyspaced from the stud and connected to the holding means for securing theblade in the seat, the said means and the stud being located along a umedian line of the seat, the said means including a pin, and the bladehaving an open ended slot for engaging the pin upon the said angularmovement of the blade.

6. A device including a blade having a longitudinal closed ended slot, aholding means having a longitudinal concave seat, the blade being ofless width than the seat and being adapted to be transversely flexedinto the seat, the holding means having a rigid T-shaped stud projectingfrom the seat with the head or the stud extending transversely of theseat and adapted to engage the blade through the slot thereof on angularmovement of the blade, said head having its under side convexed from endto end to constitute a cam for pressing the blade into flexed seatingrelation in the seat, and means longitudinally spaced from the stud andconnected to the holding means for securing the blade in the seat, thesaid means and the stud being located along a median line of the seat,the said means including a pin, and the blade having an open ended slotnally shift the blade to cause the same to abut 5 the stud at an end ofthe closed ended slot and in the plane of the blade.

'l. A device including a flexible blade having a closed ended slot, aholding means having a concave seat and having a T-shaped stud at the 10seat, the elongation of the head of the stud being transverse oi theseat concavity and the said head being adapted to pass through said slotto engage over the blade on angular movement of the blade, the undersideof the head being con- 15 vexed from end to end for cam engagement overthe blade to flex the same into the seat, and the convexity beingsufficient to permit blades of difierent widths to be securely flexedinto the seat by changing the width of the closed ended slot. 20

I JOHN E. DAVEY.

